Ichimatsu Airi has been married to her husband for three years and lives with him. Her husband, who has been working overtime all this time, is coming home on time, so she makes him some hotpot and waits for him. He tells her he will be coming home after working overtime again today. Airi is feeling lonely and masturbates when her husband's coworker Sato comes to visit and sees Airi masturbating in a passionate and troubling way...